While reading about password breaches, it occurred to me; where are the TOTP shared secret breaches? Because TOTP relies on a shared secret (unlike say U2F) the server has a copy of the shared secret, which lends itself to the same vulnerability to be breached.
I've tried searching and found nothing, save for a potential incident with Linode (https://www.linode.com/blog/linode/security-investigation-retrospective/)
I'm sure we can speculate on the reasons why or why-not, but that is not my question. Am I just searching for the wrong things, or are TOTP secret breaches just that rare/non-existant? (recent & past events)